When did Ford change the Pistons on the 351M?

When did Ford change the Pistons on the 351M?

Attempting to solve the 351M problems, Ford changed 351M pistons every year from MY 1977 to MY 1979. In 1977, they dropped the compression ratio from the original 8.6:1 to 8.3:1, then in 1978, they dropped the compression to 7.74:1. In 1979, Ford went back to 8.3:1 pistons in the car 351Ms.

Is the 351C engine interchangeable with the M Block?

Both engine types in the 335 series (351C and M-block) share many design characteristics, but the only major component that is interchangeable between 351C and M-block engines is the cylinder head.

What’s the difference between a Ford 400 and 351M?

In fact, the only functional difference between the 351M and 400 is the crankshaft and pistons. Ford did use slightly different components in the 351M and 400, such as harmonic balancers, camshafts, and valve springs, but functionally, the engines were identical except for the crankshaft and pistons.

What was the compression ratio of the Ford 351M?

The 351M’s unique piston was a dished type that produced a compression ratio of 8.6:1 when it was introduced. The 351 Cleveland built such a strong performance reputation and market appeal that Ford referred to the 351M as a “351 Cleveland” in their own marketing literature for at least the first couple years after the 351M was introduced.

What kind of engine does a Ford Bronco have?

From 1977 to 1982, M-block (351M/400) engines were a mainstay of Ford light truck powerplants. During this period, the M-block 400 was the largest V8 available from the factory in a 4×4 truck (Bronco or pickup). The 460 was not a factory option in 4×4 pickups until 1983.

When did Ford stop making the 351C engine?

Production of the 351C ended during the 1974 model year. To keep up with the market demand for engines in the 350 cubic inch class (which apparently Ford couldn’t do with its production of the 351 Windsor alone), the 351M was developed. The 351M was first used in passenger cars in the 1975 model year.

What’s the difference between a 400 and a 351M engine?

Likewise, Ford’s use of the 400 blocks in the creation of the 351M engine has resulted in the 400 mistakenly being referred to as the “400M” or “400 Modified.” This is despite the 400 has been the design basis from which the “modified” 351M was derived and it was in production several years before Ford used the “M” designation.

Both engine types in the 335 series (351C and M-block) share many design characteristics, but the only major component that is interchangeable between 351C and M-block engines is the cylinder head.